Scale.



' J. H. A. BOUSPIELD.

SCALE.

APPLICATION FILED JUNE 16, 1913.

1,128,844. Patented Feb. 16,1915.

-3 SHEETS-SHEET l.

7 6 622 asses \l J, H. A. Bowman).

SCALE.

APPLIGATIOH FILED JUNE 16,1913.

1 i Pais nted Feb. 16, 1915.

8 SEEEIS-SHEET 2.

J. H. A. BOUSFIELD.

SCALE. 7 APPLIGATION FILED JUNE 16, 1913.

Patented Feb. 16, 1915 3 SHEETS-SHEET 3.

' to the levers D and E and transmit the load to be weighed to sa 1d lovers. The levers r3 JOHN H. A. BOUSFI ELID, OF ST. JOHNSBURY, VEBMQNT, .FLSSIGNCB TO E. St '1.

scans.

To all 10710777. it may concern Be it known' that 1, JOHN H. A. Bons- FIELD, a citizen of the United States of America, residing at St. Johnsbury, in the county of Caledonia and State of Vermont, have invented certain new and useful Tmprovements in Scales, of which the following is a specification, reference being bad therein to the accompanyino drawings.

The invention relates to scales and more particularly to pit scales such as are employed for railroad tracks or the like.

The invention resides in the novel construction, arrangement and combination of parts as will more fully hereinafter appear and as claimed. I

In the drawings,Figure 1 is a cross section through a scale embodying my inven tion; Fig. 2 is a fragmentary top plan view thereof; Fig. 3 is a side elevation of the parts shown'in Fig. Fig. 4 is a side elevation of the fifth lever; Fig. 5 is an end ele ,vation thereof; Fig. 6 is a top plan view illustrating certain details of construction;

Fig. 7 is an end elevation looking at the.

free end of the fifth lever; and Figs. 8 and 9 are sections through the fifth lever; Fig. 10 is a plan view of the casting.

The scale illustrated in the drawings is of the railroad track type and comprises a plurality of systems of levers as A and B in the art. ln this type of scales, that is.

where a plurality of systems of levers are employed, since the greater weight of the load shifts from one system to the other,

' particularly during the moving of the lead over the tracks of the scale, there is a tendency for the systems of leversto pull unevenly upon the fifth lever, thereby introducing objactionable vibration. T have therefore, so constructed the connection be tween." the lever systems as to avoid the objectionable torsional stresses or strains being transmitted to the lever C. Each system of levers is herein shown as composed of levers A and compound levers and The levers A extend at right angles have their adjacent ends provided with knife edge pivots F with which saddle- Specification of Letters Eatent.

and

Application filed June 16, 1913. Serial No. 773,950

blocks G engage. Each block is provided with doivnwardly-extending bolts or rods H 1 respectively arranged upon opposite sides of its pivot F and having the lower ends passing through apertures .l in the head K of a clevis The lower end of this clevis is bifurcated to receive the upper end M of a bearing member N, and is connected thereto by means of a bolt 0. The member N is provided with spaced loops l? which carry bearing blocks Q for engaging knife edge pivot R on the fifth lever. .ln order to obtain a proper line contact between the bearing Q and the pivot B wh n one memberll moves independently of the other, a slight lateral rocking is permitted by providing the bottom face of the block Q, with a curved surface S which engages the base of the loop P.

The fulcrum for the fifth lever is formed of a heavy casting T having the base U suitably secured to a support V and pro vided with spaced upwardly-extending sides W. In order to permit the fulcrum bearing to be of the desired width the sides have removable caps X which carry the bearing blocks Y, in the form of loose roeke' steels, so as to maintain at all times a full line contact with the knife edgepivot Z on the fifth lever.

A are bolts passing through the sides and the caps, for securing the latter to the former.

is before stated, the provision of the removable caps permits a wide fulcrum hearing, and as shovn in Fig. 4t this fulcrum bearing is wider than the connection to the extension lever E, so that the strains transmitted through the exten ion lever will come inside of the points of fulcrum of th fifth lever. Such an arrangement also allows of reinforcing the portion of the fifth lever that carries the pivot Z. Thus the latter is provided with a. plurality of crossties B, forming in eifect an Lshaped cross,- seetion. One of these ties is positioned adjacent the pivot 21 and has integral, lateral extensions C that not only permit of spacing the pivot points the desired width, but

also serv to materially reinforce the pivots. Similarly the beam L; is provided "with integral, latera enlargements D forming a comparatively wide reinforcement for the pivot it. In order to permit spaced loops the bearing N to be engaged with the pivot R, the upper ortion'lvi Which connects the is formed in two sections, as shown in Fig. 6, these sections being clamped together after the parts are properly assembled, by means of bolts E.

The outer end of the fifth lever is connected to the steelyard rod F by means of a link G havinga rocker bearing II that engages a knife edge pivot I carried by a member J preferably in the form of a sleeve adapted to engage over the free end of the lever C and secured thereto by means of bolts K.

By the arrangement of parts heretofore described the torsional strains transmitted to the lever C not only are reduced to a minimum, but the rocker connections between the bearing blocks Q Y and H insure a full line contact with their respective pivots at all times. To further lessen the vibration and torsion when the weight is moved over the scale, I tie the fulcrum stands of the main and extension levers so as to form in effect a continuous frame. Thus as shown, L M .L O P and Q are the fulcrum stands for the main and eX- tension levers. Tbestands M Q, and Ia l are connected by means of longitudiwhy-extending braces R, preferably or channel configuration, these braces having their ends bolted to brackets S formed integral with the stands. The eiztension lever stands L M and O Q, are connected to the stands N P of the main levers by means of transversely-extending ties T having their opposite ends respectively connected to brackets llV formed integral with the extension and main lover stands respectivply. When the stands are so connected an exceedingly rigid structure is provided.

What I claim as my invention is 1. In a scale, the combination with complementary inain lovers, of a lever adapted to be operated thereby, and connections between said main levers and said operated lever, including a rigid sectional bearing and a fulcrum connection between said bearing and said operated lever.

2. in a scale. the combination with complcuiontarv main levers, of a lever adapted to be operated thereby, and connections be tween said main levers and said operated lover. including spaced loops provided with laterallv-cxtending portions at their upper ends adjnstably connected together.

3. In a scale, the combination with complemcntary main levers, of a lever adapted to'bc operated thereby, and connections between said main lovers and said operated lever, including spaced loops arranged upon opposite sides of said operated lever, hear ing blocks carried by said loops, and a knifeerlge pivot carried by said operated lever engaging said blocks, said loops being provided with laterally extending portions adjacent their upper ends adjustably con: nected together.

4. In a scale, the combination with a lover, of a lever adapted to be operated thereby, a connection between said levers, support provided with spaced portions intermediate which said operated lever is or ranged, one of said spaced portions includranged. one of said spaced portions includ pivot, and bearing connections between'said portions and the operated lever, one of said connections having a part thereof carried by said cap.

6. In a scale, the combination with a main lover. of a lever adapted to be operated thereby, a support for said lever comprising spaced portions intermediate which aid operated lever is arranged, lateral extensions upon said lever, and pivotal connections be tween said lateral extensions and said spaced portions, one of said spaced portions including a detachable cap.

7. In a scale, the combinationwith a main lever, of a lever adapted to be operated thereby, a support for said lever compris .ing, spaced portions intermediate which said operated lever is arranged, lateral extensions upon said operated lever, said spaced portions including a detachable cap, a fulcrum connection intermediate each of said lateral extensions and said spaced portions, including a knife-edge pivot carried by the one and a bearing block carried by the other. 8. In a. scale, the combination with a main operating lever, of a lever adapted to be operated thereby, a support for said operated lever including detachable caps, bearing blocks carried by each of said caps and having a rocking connection therewith, knife-edge pivots projecting laterally from. said operated lever and engaging said bearing blocks. 7

9. In a scale, the combination with a main operating lever, of a lever adapted to be op erated thereby, a support comprising spaced bifurcated members, detachable caps connected to said spaced bifurcated members, laterally-extending portions upon said operated lever, and a fulcrum connection between said caps and said lateral extensions. 10. In a scale. the combination with a main lever, of a lever adapted to be operated thereby, a support for the operated lever, comprising spaced members intermedimg a detachable cap carrying a knife-edge ate which said operated lever is arranged,

'said spaced members having a bifurcated I the latter, and a knife-edge pivot and bearing connection between each of said spaced portions and the operating lever.

11. In a scale, the combination of an operated lover, of a stcelyard rod and a connection between said steelyard rod and said operated lever, comprising a section carried by and secured to said lever, a loop opera-v tively connected to the steelyardrod, a hearing block carried by and having a limited rocking movement in relation to said loop, and a knife-edge bearing upon said section engaging said bearing block.

12. In a scale, the combination of an operated lever, of a steelyard rod and a connection between said steelyard rod and said operated lever, comprising a section carried by and secured to said 'lever, a loop spanning said section. a bearing block carried by and having a limited rocking inovement in relation to said loop, and a knifecdge bearing upon said section engaging said bearing block.

13.. In a scale, the combination with a plurality of levers, of longitudinally spaced fulcrum stands, a rigid connection therebe tween, of fulcrum stands spaced laterally from the first-mentioned stands, and rigid connections between the latter and the second-mentioned stands arranged in planes transverse to the plane of said first-men tioned rigid connection.

l-t. In a scale, the combination with a members of said series and the fulcrum stands for the main levers.

15. In a scale, the combination with com plementary main levers, of a lever adapted to be operated thereby, connections between said operated lever and main levers including spaced loops having lateral projections extending adjacent each other, and means for detachably connecting said projections.

16. In a scale, the combination with apair of main levers, of a lever adapted to be operated thereby, connections between said main levers and operated lever comprising a bearing member having rigid depending loops, said member being detachably connected.

17. In a scale, the combination with main levers, of alever adapted to be operated thereby, connections between said operated lever and main levers including complementary bearing members, each of said members having a loop depending from one end thereof, and means for detachably connecting said bearing members.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN H. A. BOUSFIELD.

Witnesses E. E. HoLBRooK, O. A. ULLRICH. 

